Hematite Antique Silver Plated 4mm Faceted Rondelle - 15-16 Inch 6mm Pink Purple Blue Chalcedony is a naturally

Blue Chalcedony is a naturally occurring soft blue translucent stone

Magnesite is a soft mineral best known for being dyed to imitate other gemstones

Gamma ray irradiation

Mexican Black and Red Zebra Jasper has banded and marbled patterns of translucent to opaque milky white

Biotite is a name used for a large group of black mica minerals that are commonly found in igneous and metamorphic rocks

Hematite Antique Silver Plated 4mm Faceted Rondelle - 15-16 Inch 6mm Pink Purple Blue Chalcedony is a naturallyHematite is an iron oxide and one of the few gemstones with a metallic luster. When tumbled it can have the look of polished steel. Hematite is black to steel to gray or silver to gray, as well as brown to reddish brown or red in color. Its name is derived from the Greek word for blood, haima, owing to its red appearance when sliced thinly or powdered.